mp-2 - nrcan
TRANSCRIPT
CCRMP PCMRC Canadian Ceriified Reference Materials Project Projet canadien de moteriaux de reference certifies
CANMET !'0,ining and rV\inerol Sciences Laboratories Loboratoires des mines et sciences minerales de CANt,AU 555 Booth Street, Ottowa, Canoda K1A OG 1 555, rue Booth, Ottowa, Canada K1A OG 1
Tel. (613) 995-4738, Fox: (613) 943-0573 Tel . (613) 995-4738, Wee : (613) 943-0573 E-moil: [email protected] Courriel : [email protected]
www.ccrmp.ca www.pcmrc.ca
MP-2 Tungsten-Molybdenum Ore Reference Material
Certified Values and 95% Confidence Intervals
Constituent W 0.65 % ± 0.02 % Mo 0.281 % ± 0,010 % Bi 0.245 % ± 0,007 % Sn 0.043 % ± 0,002 % Ag 4.9 ~g/g ± 0,3 ~g/g
Source MP-2 is a sample of tungsten-molybdenum ore representative of the wolframite-molybdenitebismuth mineralization deposits at Mount Pleasant, New Brunswick, The raw material was obtained from the Billiton Exploration Company Limited.
Description The product is a powdered compositional reference material having primarily a siliceous matrix.
Method of Preparation The material was hand-picked at the mine site by CANMET geologists. It was crushed and dryground to -200 mesh, The powdered ore, weighing
170 kg, was blended in a 570-L conical blender for 8h and bottled in 200-g units.
Intended Use MP-2 is intended for quality control in chemical analysis.
Instructions for Use MP-2 should be used "as is" without drying, The contents of the bottle should be thorougWy mixed before taking samples.
State of Homogeneity The homogeneity of the stock with respect to its bis
muth and silver contents was tested and confirmed by a commercial laboratory using bottles chosen according to a stratified random sampling scheme. Multi-acid decomposition with atomic absorption
finish was used for both elements. A second silver determination used fire assay preconcentration and atomic absorption finish.
Natural Resources Ressources naturelles Canada Canada1+1 Canada
Mineralogical Composition
Mineral wt% Mineral wt% Quartz 70.0 Molybdenite 0.4
Chlorite 10.0 Bismuth 0.25 Topaz 5.0 Chalcopyrite 0.23
Lepidocrocite 5.0 Rutile 0.2 Fluorite 2.0 Bismuthinite 0.2 Calcite 1.0 Pyrite 0.1
Wolframite 1.0 Monazite 0.1 Loellingite 1.0 Zircon 0.1 Sohalerite 0.7 Galena 0.05
Approximate Chemical Composition
Constituent wt% Constituent wt% Si02 76.1
AI 5.4 F 4.1 Fe 3.7 Ca 2.7 S 0.7
Zn 0.4
Method of Certification MP-2 was certified by an interlaboratory analysis
program. Nineteen laboratories participated in the
interlaboratory program to provide analytical results
for five elements in MP-2.
Legal Notice The Canadian Certified Reference Materials Project
has prepared this reference material and statistically
evaluated the analytical data of the interlaboratory
certification program to the best of its ability. The
purchaser, by receipt hereof, releases and indemni
fies the Canadian Certified Reference Materials
Project from and against all liability and costs aris
ing out of the use of this material and information.
As 0.2 Cu 0.09 Sn 0.043 Mg 0.04 Ph 0.04
C (total) 0.02 H 20 (lOS·C) <0.1
Reference The preparation and certification procedures used for
MP-2, including values obtained by individuallabo
ratories, are given in CANMET reports 83-14£,
"MP-2: A certified tungsten-molybdenum reference
ore", and 84-10£, "Reference materials CZN-I,
CPB-I, CCU-I, MP-Ia and MP-2: Additional recommended values". These reports are available free
of charge on application to:
Coordinator, CCRMP CANMET (NRCan)
555 Booth Street
Ottawa, Ontario, Canada
K1A OGl
Telephone: (613) 995-4738
Facsimile: (613) 943-0573
E-mail: [email protected]